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Old 20th April 2008, 02:21 PM   #1
kvda
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Default Replacement Formula 155 for big isonic

Yesterday I've sailed a 2007 isonic 145. Love the ride, speed with ease. Compared to that ride, my old Formula 155 feels like an oldtimer... Makes me think to replace my old Formula 155 d-ram (2001) by the end of this year (or maybe sooner, you know how stuff like this works... )

One factor I am afraid of is the windrange and sailsize. I own a RS racing 9.8 and Vapor 2007 11.0. Should I go for the 145/144 or 155/150 Isonic to replace my old Formula 155 , that's the question. Two surfmates own the 2007 145, they say it can easily manage a RS4 10.7 and Code Red 11.0.
Love the old 155 for it's early planing, but with a 9.8 full powered up the board becomes soon too big. Don't want to loose to much in the lower windrange.

Other boards of mine are the isonic 125 2006 wood and s-type 104 2007 wood.

What would be the best option, 144/145 or 155/150??
(my size: 1.90 m, 90 kg)

Last edited by kvda; 20th April 2008 at 02:23 PM.
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Old 20th April 2008, 05:12 PM   #2
Jean-Marc
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Without any hesitation for your weight AND your largest 11.0 sail : iSonic 155/150

For your weight, max efficient sail size on iSonic 145 : 9.5 m2 with a 58-60 cm max fin (Ian Fox weights ± 95 kg).
http://2007.star-board.com/forum/vie...hread_id=21055

iSonic 144W85 is a large slalom for heavy weight, nothing to do with a freeformula : 10.0 m2 max sail with 52-55 cm fin.

Cheers !

JM

Last edited by Jean-Marc; 20th April 2008 at 05:16 PM.
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Old 21st April 2008, 02:58 AM   #3
mark h
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Hi KVDA
Like JM says, the iS144 is not in the the same group as last years iS145 (kinda free-formula). The iS144 is pure light wind slalom for 9x to 10m 7k to 11k PWA minimum winds.

Although SB say 10.5m max on iS144 it does work well with an 11m, but, its on its limit and best to only use this combo on flat/flatish water.

As you'v got an iS125 (and if your keeping the iS125) then a iS150 would be best. If you did not have an iS125, an iS144 would be best.

Your 9.8m will work nicely (in flat-ish water) with your iS125, have you tried it? A newer Formula is definetly another option. Due to the shorter length, the F159/160 both feel much crisper, more alive and faster than the F155 (I used to have a F155, then a F158, then a F159). Formula to iS125 would be a usefull option. The F161/162 are real fine boards but have become ultra light wind specialist since Slalom 42 come out, so high wind control "might" not be as good as F159/160 (got a feeling I might regret saying that).

I was tempted to go with the 08 iS150 but ended up going with a iS144, mainly because I prefer the thicker rear rails on the iS144.
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North Warps: F2012 5.2m, 5.7m, 6.3m, 7m, 8m, 8.6m, 9.5m F2006 11m.

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Old 21st April 2008, 02:32 PM   #4
kvda
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Tnx for your replies jean marc and mark h, I do appreciate it!

So the 144 is not just a 'new 145' but a quite different shape if I do understand it right. So It's not gonne be the 144, neither the 145.

Yes I will keep the 125 isonic wood, because it's the best board I 've ever had! Love it. Would the 9.8 really work ok on the isonic 125?? I will try, although SB says 9.0- 9.5 is the max. Should put some extra fin, say about 48- 50 cm's (How big do you think? )

I was avoiding to choose an newer formula, due to the fact that the isonic 145 felt so much more relaxed than a formula does. To put it another way: less specialistic. The 155/150 seems ok to me. But maybe also an second hand F-type ?!?

Greetz !
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Old 21st April 2008, 02:36 PM   #5
kvda
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Tnx for your replies jean marc and mark h, I do appreciate it!

So the 144 is not just a 'new 145' but a quite different shape if I do understand it right. So It's not gonne be the 144, neither the 145.

Yes I will keep the 125 isonic wood, because it's the best board I 've ever had! Love it. Would the 9.8 really work ok on the isonic 125?? I will try, although SB says 9.0- 9.5 is the max. Should put some extra fin, say about 48- 50 cm's (How big do you think? )

I was avoiding to choose an newer formula, due to the fact that the isonic 145 felt so much more relaxed than a formula does. To put it another way: less specialistic. The 155/150 seems ok to me. But maybe also an second hand F-type ?!?

Greetz !
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Old 22nd April 2008, 12:15 AM   #6
mark h
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Hi
Your iS125 will take 9.5m no problem, but you must be powered up as slogging will be horrible with max sail. 9.8m can be viewed as 9.5m as they will have similar boom length & both use 520 masts, so .3m wont make any difference. I'm 105kg and have used a 10m on my old Sonic 125 on flat water, 9m is better but 10m was still fun. 46 to 49cm fin is about right on real light days but you can go smaller.

I'd try it with your RS 9.8m first, you might find that with the right fin, your iS125 becomes a real light wind weapon.
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The toys:
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North Warps: F2012 5.2m, 5.7m, 6.3m, 7m, 8m, 8.6m, 9.5m F2006 11m.

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Old 22nd April 2008, 05:09 AM   #7
Jean-Marc
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Quote:
Originally Posted by mark h View Post
I'd try it with your RS 9.8m first, you might find that with the right fin, your iS125 becomes a real light wind weapon.
I doubt it. For true "light wind weapon" efficiency, better stick with the old F155 with the 9.8 sail IMHO, especially with 90 kg on board. Or better yet with the 11.0 sail and 65 cm fin...

Facts is all of my 85-105 kg pals use a Formula with 10.5-12.5 m2 sails as true light wind weapon combo (i.e., 7-10 knots winds). Those with iS125/iS122/iS122W75 and 9.0 combo are shlogging without exception (the only fews that can plane weight 65-75 kg).

Cheers !

JM

Last edited by Jean-Marc; 22nd April 2008 at 05:18 AM.
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Old 22nd April 2008, 05:56 PM   #8
mark h
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Hi JM
I was not suggesting that a 125/9.8m would work in 7-10 knots, we have formula for those days. I'm talking about "light wind slalom" I.E. 10-12 knots-ish on flat water, which might be more fun for KVDA instead of his F155. But since KVDA already has an RS 9.8m/iS125 theres no harm in him trying the combo to see how it works out.

Unless your a formula racer, most regular guys/girls want to get of Formula as soon as possible and get onto something a bit more sleek/fun. 10-12 knots is when "big slalom" gear starts to work well.

Reading between the lines, KVDA just wants to change his 7-year old board for something more modern (I think??). The newer Formula's have much bigger OFO tails CW the F155 (which he says starts to feel big with his RS9.8m) so he's right to look at an iS150/iS155/FT158. All should get going nearly as early as the F155 and all will take his Vapour 11m.
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The toys:
iSW44 - - iSW49 - iSW53 - iSW58 - iS107 - iS137 - F161.
North Warps: F2012 5.2m, 5.7m, 6.3m, 7m, 8m, 8.6m, 9.5m F2006 11m.

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Old 22nd April 2008, 06:10 PM   #9
Jean-Marc
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Fully agree iSonic150/iSonic155/FT158 is way more forgiving in choppy & windy 9.8 conditions than a dedicated Formula for someone who is not racing. More efficient with an 11.0 sail and 70 cm fin than the old and narrower F155 as well in true light wind conditions with 90 kg on board.

Cheers !

JM
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Old 22nd April 2008, 06:53 PM   #10
Jean-Marc
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Mark,

I guess we disagree on what a light wind "weapon" is all about. My apologies.

BTW, check out what Rémi (± 85 kg) thinks of a 9.0 or 10.0 sail between iS122 and 133 for light wind slalom racing :
http://www.star-board.com/forum/showthread.php?t=3193

Cheers !

JM
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